[Clang][NFC] Clean up unused binary files for offloading tests (#87351)

Summary:
We have a few binary files used for offloading tests that are either
entirely unused or easily replaceable.

Author: jhuber6

clang/test/Driver/Inputs/in.so

@@ -1,6 +1,7 @@
 // RUN: touch %t.o
+// RUN: touch %t.so
 // RUN: %clang --hip-link -ccc-print-bindings --target=x86_64-linux-gnu \
-// RUN:   --cuda-gpu-arch=gfx803 --cuda-gpu-arch=gfx900 %t.o %S/Inputs/in.so \
+// RUN:   --cuda-gpu-arch=gfx803 --cuda-gpu-arch=gfx900 %t.o %t.so \
 // RUN:   --no-offload-new-driver -fgpu-rdc 2>&1 | FileCheck %s
 
 // CHECK: # "x86_64-unknown-linux-gnu" - "offload bundler", inputs: ["[[IN:.*o]]"], outputs: ["[[HOSTOBJ:.*o]]", "{{.*o}}", "{{.*o}}"]
@@ -11,4 +12,4 @@
 // CHECK-NOT: offload bundler
 // CHECK: # "amdgcn-amd-amdhsa" - "AMDGCN::Linker", inputs: ["[[IMG1]]", "[[IMG2]]"], output: "[[FATBINOBJ:.*o]]"
 // CHECK-NOT: offload bundler
-// CHECK: # "x86_64-unknown-linux-gnu" - "GNU::Linker", inputs: ["[[HOSTOBJ]]", "{{.*}}/Inputs/in.so", "[[FATBINOBJ]]"], output: "a.out"
+// CHECK: # "x86_64-unknown-linux-gnu" - "GNU::Linker", inputs: ["[[HOSTOBJ]]", "{{.*}}.so", "[[FATBINOBJ]]"], output: "a.out"

clang/test/Driver/Inputs/libomptarget/libomptarget-new-nvptx-sm_35.bc

@@ -304,8 +304,7 @@
 // RUN:   | FileCheck %s --check-prefix=CHECK-EMIT-LLVM-IR-BC
 // CHECK-EMIT-LLVM-IR-BC: "-cc1"{{.*}}"-triple" "nvptx64-nvidia-cuda"{{.*}}"-emit-llvm-bc"
 
-// RUN:   %clang -### -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target=nvptx64-nvida-cuda -march=sm_70 \
-// RUN:          --libomptarget-nvptx-bc-path=%S/Inputs/libomptarget/libomptarget-new-nvptx-test.bc \
+// RUN:   %clang -### -fopenmp=libomp --offload-arch=sm_89 \
 // RUN:          -nogpulib %s -o openmp-offload-gpu 2>&1 \
 // RUN:   | FileCheck -check-prefix=DRIVER_EMBEDDING %s